A method of manufacturing a rare earth magnet square

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PROBLEM TO BE SOLVED : To produce a rare-earth magnet that retains high magnetic coercive force and has excellent squareness.SOLUTION : The method of producing a rare-earth magnet excellent in squareness includes : a process for rapidly cooling a melt having a rare-earth magnet composition represented by the following compositional formula : RvFewCoxByMz where R is one or more types of rare-earth elements, M is at least either one of Ga, Zn, Si, Al, Nb, Zr, Ni, Cu, Cr, Hf, Mo, P, C, Mg and V, 13≤v≤20, w=100-v-x-y-z, 0≤x≤30, 4≤y≤20, 0≤z≤3, and forming a rapidly cooled thin piece having a structure composed of nano-crystal; and a process for sintering the rapidly cooled thin piece under pressure and making the piece into a sintered compact having a structure composed of nano-crystal.